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Ceres · Crater · 35th largest named feature

Omonga

Tomori/Mori (Celebes/Sulawesi, Indonesia) rice spirit who dwells in the Moon.

What Omonga is

Omonga is a crater — a circular depression, almost always an impact scar — on Ceres, 77 km across, centred at 58.0° N, 71.7° E. It is the 35th largest named feature on Ceres and the 23rd largest of its class there.

Where the name comes from

Tomori/Mori (Celebes/Sulawesi, Indonesia) rice spirit who dwells in the Moon. The International Astronomical Union approved the name in 2015, under the theme it applies to every crater on Ceres. Of the 115 features of this class catalogued on Ceres, the naming categories run Roman (6), Sumerian (5), Egypt (5), Polynesia (3).

Feature class
a circular depression, almost always an impact scar
Diameter
77 km
about the width of Yellowstone
Coordinates
58.0° N, 71.7° E
Planetocentric, on Ceres
Name approved
2015
By the IAU Working Group for Planetary System Nomenclature
Naming category
Indonesia
Asia

What it would take to settle Omonga

Ceres scores 43.8 as a world. That number is the same for every square metre of it — but sunlight, water, radiation and the ground under your feet are not. This is the same question asked at 58.0° N, 71.7° E.

Settlement difficulty here
44.7/ 100
Typical for this world
Ceres overall
43.8
0.9 harder than the median site
Ranked
111th
of 149 named places on Ceres

What this spot has going for it is water on the shoulder of the ice-bearing latitudes. What works against it is sunlight 53% of the sunlight the sunniest latitude on Ceres gets.

Computed from Omonga's catalogued latitude, longitude and feature class — 68% of the model's weight had a basis here, and 3 axes were dropped as not applicable to Ceres (radiation geometry, earth link, known ground). Gravity, pressure, delta-v and distance from the Sun are the same everywhere on Ceres and are already counted in the world's own index, not again here.

What this cannot see: elevation. Slope, local shadowing and the polar “peaks of eternal light” — ridge tops near the poles of a barely tilted world that catch sun almost continuously while a crater floor kilometres away never does — need a terrain model this does not have. Where a real mission targets a pole, that is usually why.

What is next to it

The largest crater features on Ceres

All 115 craters on Ceres — mapped together, with the naming theme and the size distribution.